TM 55-4920-231-14
INTRODUCTION
Section I.
GENERAL
2. REPORTING OF IMPROVEMENTS.
1. SCOPE
Report of errors, omissions, and recommenda-
These instructions are published for the use
tions for improving this publication by the in-
of operating and maintenance personnel to whom
dividual user is encouraged. Reports should be
the pitot and static systems tester is assigned.
submitted on DA Form 2028 (Recommended
They contain information on the operation,
Changes to DA Publications) and forwarded
lubrication, detailed preventive maintenance
directly to Commanding General, U. S. Army
Aviation Systems Command, ATTN: AMSAV
services, and maintenance of the equipment and
RM, P.O. Box 209, St. Louis, Missouri 63166.
its accessories. These instructions also include
packing, preservation, storing, and shipping pro-
cedures. Also included is the applicable repair
The Army equipment record system and pro-
parts and special tools lists. Appendix A con-
cedures established in TM 38750 apply to this
tains a list of applicable references and appen-
equipment. The applicable forms as required by
TM 38750 shall be used.
dix B contains the maintenance allocation chart.
Section II. DESCRIPTION AND DATA
(3) Operation caution (D, figure 2), on the
4. DESCRIPTION.
tester case between vacuum DECREASE knob
a. General. The pitot and static systems tester
(19, figure 7) and vacuum INCREASE knob
(17).
and vacuum system whose primary function is
(4) Operation caution (E, figure 2), on the
the testing of aircraft instruments such as altim-
tester case between pressure INCREASE knob
eters, rate-of climb indicator, air-speed indica-
(12, figure 7) and pnessure DECREASE knob
tors, and manifold and fuel pressure gages. The
(11).
test accurately simulates engine or atmospheric
(5) Operation instruction (F, figure 2), on
pressures and vacuums such as are met in the
the tester case between the vacuum INCREASE
normal operation of an aircraft. Simulation of
KNOB (17, figure 7) and the pressure IN-
these pressures and vacuums is accomplished by
CREASE knob (12).
a small, high-speed pump capable of producing
( 6) Conversion chart (G, figure 2), under-
pressures up to 50 pounds per square inch and
side of upper access panel (9, figure 7) of
a vacmun equivalent to an altitude of 80,000
tester.
feet.
(7) Selector valve lever instructions (C,
b. Identification. The identification plate and
instructions are identified and located as follows:
is visible when the rear access panel (11) is
(1) Identification plate (A, figure 2),
opened.
center of lower front access panel (18, figure 7)
(8) Calibration card (H, figure 2) on the
of tester.
upper access panel (9, figure 7) of tester (1).
(2) Operation warning (B, figure 2), be-
c. Deviations in Models. This manual covers
tween vacuum selector knob (20, figure 7) and
fuel pressure gage (5) on front panel (21).
the pitot and static systems tester, REIC model
